circumstance意为"环境,情形,情况",常用复数形式,表明与某事件或某人有关的情况,环境,境况等.
He was forced by circumstances to do this.
situation意为"情形,境遇,(建筑物等的)位置"
The situation was not good for her.
区别主要在一些搭配上吧,如in the situation,under no circumstance
circumstance意为"环境,情形,情况",常用复数形式,表明与某事件或某人有关的情况,环境,境况等.
He was forced by circumstances to do this.
situation意为"情形,境遇,(建筑物等的)位置"
The situation was not good for her.
区别主要在一些搭配上吧,如in the situation,under no circumstance